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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: QCISD/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/cc-pVTZ
 hartrees
Energy at 0K-225.787990
Energy at 298.15K-225.794004
HF Energy-224.895032
Nuclear repulsion energy163.560774
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at QCISD/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3723 3558 70.39      
2 A' 3311 3164 1.30      
3 A' 3283 3137 0.24      
4 A' 3281 3135 4.66      
5 A' 1592 1521 11.92      
6 A' 1541 1472 18.10      
7 A' 1472 1407 19.21      
8 A' 1391 1329 6.92      
9 A' 1305 1247 0.50      
10 A' 1170 1118 7.28      
11 A' 1162 1110 1.70      
12 A' 1112 1063 11.34      
13 A' 1090 1041 40.05      
14 A' 950 908 1.50      
15 A' 914 873 6.94      
16 A" 895 855 1.79      
17 A" 862 824 29.14      
18 A" 756 722 42.82      
19 A" 686 655 6.03      
20 A" 649 621 8.37      
21 A" 501 479 92.74      

Unscaled Zero Point Vibrational Energy (zpe) 15822.4 cm-1
Scaled (by 0.9555) Zero Point Vibrational Energy (zpe) 15118.3 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at QCISD/cc-pVTZ
ABC
0.32684 0.31470 0.16033

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.105 0.000
C2 -1.084 0.281 0.000
C3 1.117 0.296 0.000
N4 -0.746 -0.982 0.000
C5 0.636 -0.982 0.000
H6 -0.012 2.107 0.000
H7 -2.091 0.662 0.000
H8 2.114 0.695 0.000
H9 1.196 -1.900 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36161.37892.21602.18221.00162.13802.15373.2350
C21.36162.20081.30702.13392.11721.07713.22503.1556
C31.37892.20082.25901.36632.13343.22911.07432.1984
N42.21601.30702.25901.38173.17432.12393.31562.1486
C52.18222.13391.36631.38173.15633.18462.23631.0756
H61.00162.11722.13343.17433.15632.53232.55214.1854
H72.13801.07713.22912.12393.18462.53234.20604.1682
H82.15373.22501.07433.31562.23632.55214.20602.7535
H93.23503.15562.19842.14861.07564.18544.16822.7535

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 112.262 N1 C2 H7 122.054
N1 C3 C5 105.297 N1 C3 H8 122.289
C2 N1 C3 106.841 C2 N1 H6 126.566
C2 N4 C5 105.022 C3 N1 H6 126.593
C3 C5 N4 110.578 C3 C5 H9 127.991
N4 C2 H7 125.683 N4 C5 H9 121.431
C5 C3 H8 132.414
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability